Use the TCP Trace to answer the following questions.
Q-1 Examine packets 1 & 2, what is the MSS for packet 1, what is the MSS for packet 2, why are they different.
a. What does the ACK field, in message 5, tell the receiver?
b. Which bytes for the HTTP packet 27 are contained in other segments?
c. What object has been requested at packet 4
d. What is the win value in packet 2 and what does it tell the receiver?
e. Which three packets are used to open the TCP connection?
f. Which four packages close the TCP connection?
g. Does this trace indicate that there is congestion? If so describe how.
h. What browser is being used by the client?
i. What server is delivering the web pages?
j. What does the CName record for pgaead2.googl.com contain?
Examine packets 5 to 12
a. What is the average RTT – show calculation
b. How many bytes were sent be the server?
c. What is the approximate transmission rate = show calculation
Examine packet 38
a. What does the E_tag field tell the receiver?
b. What do the time-out values tell the receiver?
Questions B
Use the Wi-Fi Trace to answer the following questions.
Examine Packet 1
a. Does this frame come from a host or from an access point? What details in the trace support your answer?
b. There are a lot of beacon frames. Research what a beacon frame is and describe the expected fields in a Beacon Frame. Connect your answer with packet 571
Examine Frame 700
a. What Transmission rates are supported?
b. What encryption protocol is being used?
c. What is the PWR MGT filed used for?
d. What is a cipher suite list?
Questions C
Use the OSPF Trace to answer the following questions.
Examine Frame 19
a. What subnet is being advertised?
b. How many hosts are in this subnet?
c. What is a “stub network”?
d. What does the “Metric” tell the receiver of this advertisement?
e. What is an AS?
f. Is this router on the boundary of an AS, provide supporting evidence for your answer?
g. What is the ID of the Router that generated the advertisement?
h. You will notice that the frame destination is name IPv4mcast_00:00:05. Is this address special? Explain your answer.
i. The packet seems to contain different types of headers. What is the purpose of the first header in the OSPF part of the packet?
Examine frame 31
a. What is the purpose of the OSPF part?
b. Read the packet, under what circumstances would a router be dead?
c. What is the backup designated router used for?
d. What is the active neighbour field telling a receiver of this packet?
e. Draw a network diagram including nodes and ip addresses and costs where they can be derived from the trace. The drawing should represent the network state just after packet 31 has been sent.
